Rated 4 out of 5 by lbalc Well made, needed tool
If you have ever bought a frame, with hanger attached, or had a fall on your drive side, then you are going to need to align your hanger. You can make do bending it with an allen key in the derailleur bolt, and this can be pretty accurate with some practice; however in the workshop this tool is very accurate and not at all time consuming. Only slight complaint with the tool is the rubber band's used to mark out when the tool is set, they both broke pretty soon after using the tool.
11 January 2014
Rated 4 out of 5 by Malcolmcam Great tool, easy to use, gives peace of mind when repairing/adjusting rear mech
Very easy to use, managed to use it straight out of the box with no confusion. I was mounting a new mech on a brand new hanger, after a particularly nasty rock pushed my last mech into the spokes. Even with the brand new hanger I had to make some fairly major adjustments to get it straight.
I understand economies of scale and all that, but at the end of the day a tool this simple shouldn't cost more than the shiny new XT rear mech being installed. Price is the only reason I rated this product 4 stars instead of 5
03 January 2014
Rated 5 out of 5 by DrSpokes Very well made, does what it says on the tin !
Another very well made product from park tools, if a bit more expensive that it's competitors. I use this on an almost daily basis as a bike mechanic and it is well worth the extra cost. Simple but worth it's weight for solving those shifting problems.
24 November 2013
Rated 5 out of 5 by veloyug Convenient and simple in use / Удобен и прост
Tool is very convenient, simple and precise.
Инструмент очень удобен и прост в использовании. Теперь выровнять "петуха" стало делом нескольких минут.
20 November 2013
Rated 5 out of 5 by saladdodger If you like DIY - get one of those
I recently went to a local bike shop on the way to the trails, as I just couln't get my gearing to align properly. The mech tried the adjustment screws and after a while figured "the hanger is bent".. Well, not a first time.. What was the first time though, was charging me 30 bucks to straighten it out...Needless to say, I went home and ordered the DAG2 straight away. If you are a bit of a home mechanic, this tool is simple to use, of extremely high build quality (as partktools tends to be) and works perfectly fine. I am aware there is cheaper ways of doing that, but if you like precision and rather own the tool than paying someone else to use it on your bike - the DAG2 is a must..
15 November 2013
Rated 5 out of 5 by Anonymous Does the job. Well made piece of kit
I bought this because I couldn't be bothered to make my own (which would have been more clumsy anyway).
It's well built and works well once you get the hang of it (it's an iterative process).
If you can afford it, get one for you kit. It's another good tool to isolate what is causing your poor shifting if you've already been through all the other possible causes. You'll be ahead once you've used it two or three times (the cost for the LBS to do it for you).
04 March 2013
Rated 4 out of 5 by Anonymous Pricey
Only 4 stars due to cost of the item,I have a vintage kona lava-dome,yesterday the rear derailleur decided to wrap itself around the frame i.e. the hanger was twisted nearly parallel with the hub.I ordered one of these at 10am,less than a day later it arrives at 8:30am not bad for a free delivery.It took about 5min to get the hanger from touching the freewheel to perfect shifting!
23 March 2012
Rated 4 out of 5 by Anonymous geeky tool :)
firstly this is way over priced, i picked mine up for £45 and that is still robbery! anyway if some blind person knocks you off you'll need one so get one and rent it for beer money :) in use it's a right faff till you work out the best way to use it. spin your wheel if it's pringled then make sure you rotate the wheel so that your use the same datum point during measurement as rotating the wheel is a faff with the mech hanging off. A straight wheel means simply rotaing the device, but as it's not co-axial the pointer needs to slid down the shaft out of the way to avoid the tyre! it all makes sense after a while. Also i stripped mine down and reassembled as it should slide smoothly there was a bent plate spring that wasn't seated properly on mine. Also copper grease the thread each use. works on replaceable hangers, but be gentle as they move suprisingly easy :)
30 July 2010